Calculating device.



C'. COE.

CALGLATNG DEVICE.

APPLIGAToN FILED LIAR4 Fatente Jan, 7', 1913.

2 SHEETSPSHEET l.

Aragua/1 .y t l,

said beaings over l ani 0 horzonaff iin-e. whe A 0n ih@ casing,

.at 'ached fie p meml the mentioned stop menibe s being provided with exterior thumb nuts 38, 39 iior adjusti the stop members 36, 37 in the slot 35, the stop me 1 3? being arranged above the stop member 3" end adapted to be engaged by the upper eide oit the frame() of the actuating member t?. to limit trie tip-- ward swinging' movement of the actuating the lower stop member 36 being adopted to be engaged by the lower side of the frame 3G of the actuating member Q9 'to limit `the downward increment oi. the zic-- tuating member. Thus by' adjusting the stop members 3G, 37 in th'e slot 35, the stroke or swinging movement of the actuating member 29 can be increased or decreased desired. Secured to the traine 30 of the actuating .member 29, between the ends of the traine is an operating cord 4d arranged to depend from the fra-me 3G and extending through an openingdl in the easing 10 to depend exteriorly of the easing, as shown, in Fig. 1 and rigidly-secured to the frame is a horizontally extending shaft. 42 having journaled thereon a series of gravit-ationally movable dogs fl-3, 1 /i, 45, the dogs being retained in spaced relation by snitable washers i6 with the free end of the dog 43 adapted to normally repose upon the toothed wheel 26 and mesh with the teeth tliereof, the free end of the dog 44 being arranged to repose upon the toothed wheel and mesh with the teeth thereof and the tree l of the dog 45 being mounted to repose upon the toothed wheel 28 and mesh Y with the teeth thereof, the 'free ends of the provided. with a. vertically extend-ing opening 52%, the longitudinal edges of which are bent outwardly to form a track 54 having slidably mounted thereon, a closure 55 pro vided with ahandle 5G, the said closure-bemovable to increase or decrease the size of the opening 53 for a urpose that will be hereinaitter more fully isclosed.

The dials 23, filland 25 ere preferably:

niade of stamped metal and struck upwardly `from the dials'are tongues 57,' said tongues each being then split to form securing lugs 58, 59, the lug 58 bemg bent in one direction to overlap a number card 60 and the lug 59 being bent in the other direction to overla second adlaeent' number card 61, the said number cords beingoi-iranged in a circular tas on en the front faces f the dials Q3, 24 :ind by passing the cards beneath the lugs 58, 59, said lugs being adapted to secure the number cardsin place, with the lug ol? one tongue 57 adapted to secure one .side of the number card 60 and the lug 59 of the same tongue 5T being-adapted to secure a side oi' the ai acentnumber card 61. The number cards are provided with numerals 62 and by referring to Fig. 2, it will be seen that the number cards are arfmged updn the dials, adjacent the peripheries thereof'so th end of the nl unber carols on the dial'w: and the dial Q4 will not overlap the cover end of the numbers on the dial 25, the numerals on the number cards, when the saine are arranged on the dials as mentioned., being adapted to .extend diametrieally to the dials so that the numbers will be arranged in dia- ,ietrical rows and when the closure 55 is in open position, one of the diametrically extendin rows .of numbers will be disclosed throug'i the opening 58 as shown in F ig.,1.

ln the use of my device, for the purpose oit instructing pupils in the method of addition, I 'will assume that my device is mounted on the front ,wall of a schoolroom and that the closure 55 is in open position, to disclose to the pupils a row of numbers as shown in Fig. 1, the numbers when seen izlirmigh the opening 53 being arranged in `vertical order. l'he teacher now cells upon the .first pupil to orally state the sum of the numbers disclosed and when the pupilI has answered correctly and given the correct sum, the teacher pulls the cord 40, thus swinging the actuating member Q9 downwardly against the action of the Spring 34 to move the closure 33 into closed position, thus closing the opening so that the dials Q3, 24, 25 and the numbers thereon cannot be seen through the opening 53. At the moment that the actuatinv member 29 swings downwardly as mentioned, the dogs 13, 44 and 45, gravitutionally engaging the respectire toothed wheels 26, 27 and 284will revolve the toothed wheels simultaneously, thus simultaneously revolving the dialsQB, 24 or Q5 to move the next diemet-rically extending row of numbers. into registration with the opening 53. VThe teacher now releases the cord 40 andthe action of the spring 34 will swing the actuating member Q9 upwardly, thus moving the closure 33 to sented to view. It will thus be see-Ir than et the dialQ-l will not overlap the cover i each time the cord 40 is pulled, the mechanism of-my device will be actuated to'close the opening 53 and simultaneously move the dials 23, 24 and A25 tomove into position a lnew row of numbers, after which the closure 33 swinging with the actuating member.29, returns to open position to present to the pupils the new row of numbers to be added.

In the use of the device in multiplication work, the closure 55 is moved downwardly.

to restrict the opening '53, thus entirely cutting off a view of the smallest dial 23 so that the numbers thereon cannot be seen through the opening 53 and thus eachtime that the cord 40 is'pulled downwardly and then released, a row of two numbers will be shown 'and the pupils will be called upon to orally state the result when the two numbers are multlplied. The device can also be used in this manner to. add two numbers instead of three, as mentioned heretofore, and shown in Fig. 1- and in order to permit of easily disclosing tofthe pupil the method of subtraction in mathematics, the numbers von the intermediate dial 24:' are preferably made of larger denomination than the numbers on the largest dial 25 sothat when two numbers arefpresented to view to be subtracted,

the smaller number will appear beneath the larger number thus disclosing'to the eye of the student the numbers arranged as they would be ifl they were written on paper for the. purpose of subtraction. By moving the closure 55 downwardly to disclose only one number at a time, pupils in lower grades can be taught thev different numbers, the

- numbers" being preferably arranged on the dials in the usual arithmetical series so that -each time the cord40 is pulled downwardly,

if the device is initially operated to disclose 4the numeral l, the next succeeding number be provided to disclose to the pupil rows of numbers having four, five, siX and more numerals 1n each row and 1f desirable 1nvstead of employing numbers on the dials,

the letters of the alphabet can be arranged thereon, theuiumber cards being removable for the purpose of inserting new lnumber cards or cards bearing other designs or characters. have lsinuiltaneously completed an entire Now assuming that the dials revolution or cycle, if an instructor desires to change the combinations of the numbers, the same can be easily accomplished by simply inserting a linger in the opening53 and moving one of the dials toward the right, this procedure resulting -in a new combination of numbers being disclosed to view each time that the dials are operated until the same have completed another cycle, after which one of the dials can again be moved one number toward the right by inserting a finger in the opening in the manner described heretofore, to disclose to the pupils still'- another combination of numbers.

In Fig. 7I disclose a modified form of my device and in which instance the structure shown is that of a device similar to the device described with the exception that-the structure shown in Fig. 7 is made of a size similar to that of an ordinary watch and in place of the cord 40 for operating the actuating member 29, a stem 63 is employed, said stem projecting exteriorly of the casing of the structure disclosed in Fig. 7 and pro-l .stem will constitute a supporting member` and an actuating member, the device being made to fit a vest pocket and about the size of a watch as mentioned heretofore.

l. In a calculating device, the combina@ tion with a casing, of an apertured cover therefor, a, shaft j ournaled in the said casing, a series of independently revoluble dials mounted to encircle the said shaft, character cards for removable connection with the said dials and movable therewith to register with the aperture inithey said cover, a spring engaged actuating member mounted to swing on the saidshaft, means connecting said actuating member with the said dials for simultaneously operating the said dials when the said actuating member is operated, means for operating the said actuating member, a closure movable with the actuating member lto close the aperture inthe said cover when the said dials are operated and stop members adjustably mounted in the said casing for limiting'the swinging movement of the said actuating member. I v

2. In a calculating device, the combination Awith a casing, of an apertured cover therefor, a shaftl journaled in the said casing, a series of independently revvoluble dials mounted to encircle the said shaft, character cards for removable connection with the said ica;-

dials 'and movable therewith to register with the aperture inthe said cover, an actuating erating the said dialswhen the said actuating member is operated, means for operating the said actuating member, a closure movable With the actuating member te close 5. the aperture in the said cover when the said dials are operated and means adjustably mountedl in the said casing for limiting the swinging movement of the said actuating member. s

3. In a calculating device,` the combination With a, casing, of an apertured cover therefor, a shaft journaled in the said casing, a series of independentlyT revoluble `dials mounted to encircle the said shaft, character cards for removable connection with the said dials and movable therewith to register with the aperture in the said cover, an Vactuating member mounted. to swing on the sa-id sha-ft, means connecting said actuating member Awith the said dials for simultaneously operating the said dials lwhen the said actuating member is operated, means'for operatingthe said actuat ing member and a closure movable with the Aactuating member to close the aperture in the said cover When the said dials are operated. V

4. I-n a calculating device', the combination with a casing, of an apcrtured cover therefor. a shaft journaled in the said cas` ing, a series of independently revoluble dials mounted to encircle the said aft, character cards for removable ce 'with the said dials und. m table t ter with the' aperture in A actuating member mountecy swing on Athe said shaft, means connectn iid actuat ing member With-the said dials .tor simultaneouslyT operating the said dials when the said actuating iember is operated and means for operating the said actuating' member. V

5. In a calculating device the combination with a casing, of an su 'tured cover therefor, a series of indepen lv revoluble dials mounted in the said casu vided with characters Jmivablc nite. dials to register with the aperture in said cover, any actuating member me to swing in the said d conm l with the dials to simultaneafuel;Y te the same, means adjustably n'loun'ted on the l.raid casing te limit the swinging' movement cf the said actuating member and means ccnnected to the said actuating member and extending exteri'orlyof the said casing for operating' be same to' more the said da G. In a calculating devicethe combination with a casing, of an apertured cover therefor. a series of independently revoluble dials mounted in the said casing and provided with characters movable with the dial@ to register with the aperture in the said co s', an actuating member mounted to swing tien u' casing to limit the swinging movement of the said actuating member.

7. In a calculating device, the combination with a casing, of a cover therefor, a closure mounted to slide on the cover to restrict an. opening formed therein, a series of independently revoluble dialsV mounted Within the said casing and provided with characters on the faces thereof, said characters being movable with said dials to reg ister with the opening in the said cover, an actuating member mounted in the said casing and connected with the said dials to simultaneously operate the same, aI closure movable With the said actuating member to close the opening in the said cover when the said dials are operated and mea-ns connected with the said actuating member and extending exteriorly of the casing for operating the said actuating member.

8. In a calculating device, the combination with a casing, of a cover therefor, a closure mounted to slide on the cover to restrict an opening formed therein, a series of independentlyr revoluble dials 'mounted Within the said casing and provided with characters on the faces thereof, said char'- acters being movable with said dials to register with the opening in the said cover, an actuating member mounted in the Iwid casing and cnimected with the dial ,o simultaneously operate the same and a cle sure mcvablt with the said actuating mem-y ber to close the opening in the said cover when the said dials arey operated.`

9. In a calculating device, the combination with a casing provided with an apen ing, of a series of dials revolubbT mount Within the said casing and provided fr" characters movable with the dials to with the said opening, spring means .mounted in the casing and with the said dials for simultaz erating the same and a closure epcracle si.- multaneously with the operation of the said dialsto close the opening 'n the casing at the moment that the said l `ls are operated 1 lu. In a calculating device, the combina-- ith casing provi, ed with an epcu ing, e u closure for restricting the sine, of the. salu npcni fg, a series ef dials i'cwclublj,T mounted W the said fz'rasing andl pro vided ywith eters ad uted to register l -V f with the sa a5 'ng when the said dials;

cperat an actuating: memlier mounted in the casing and ccnnctttal Wlh the said dials for f-' nultaneouslv op he saine and a closure movable with Ld actu ating member te clem :he .m95 at Y pcrated 1l. In a calcuwing device, W'-

tion with a, casing provided wh Gpening, of a series of das mounted therein and provided 'with characters on 'alle faces Fuer@ of, a closure for the said opening and means mcunted in che said casing for smuaneously @painting he sai@ fas :wel the said closme to clos ne Saud op? e the said dials are Qpexzae,

n when y CUE-@XS P. C 3E. 

